/* eslint-disable */
import * as XLSX from "xlsx"
import * as XLSXS from "xlsx-style-vite"
import {saveAs} from 'file-saver'

(function (view) {
    "use strict";

    view.URL = view.URL || view.webkitURL;

    if (view.Blob && view.URL) {
        try {
            new Blob;
            return;
        } catch (e) {}
    }

    // Internally we use a BlobBuilder implementation to base Blob off of
    // in order to support older browsers that only have BlobBuilder
    var BlobBuilder = view.BlobBuilder || view.WebKitBlobBuilder || view.MozBlobBuilder || (function(view) {
            var
                get_class = function(object) {
                    return Object.prototype.toString.call(object).match(/^\[object\s(.*)\]$/)[1];
                }
                , FakeBlobBuilder = function BlobBuilder() {
                    this.data = [];
                }
                , FakeBlob = function Blob(data, type, encoding) {
                    this.data = data;
                    this.size = data.length;
                    this.type = type;
                    this.encoding = encoding;
                }
                , FBB_proto = FakeBlobBuilder.prototype
                , FB_proto = FakeBlob.prototype
                , FileReaderSync = view.FileReaderSync
                , FileException = function(type) {
                    this.code = this[this.name = type];
                }
                , file_ex_codes = (
                    "NOT_FOUND_ERR SECURITY_ERR ABORT_ERR NOT_READABLE_ERR ENCODING_ERR "
                    + "NO_MODIFICATION_ALLOWED_ERR INVALID_STATE_ERR SYNTAX_ERR"
                ).split(" ")
                , file_ex_code = file_ex_codes.length
                , real_URL = view.URL || view.webkitURL || view
                , real_create_object_URL = real_URL.createObjectURL
                , real_revoke_object_URL = real_URL.revokeObjectURL
                , URL = real_URL
                , btoa = view.btoa
                , atob = view.atob

                , ArrayBuffer = view.ArrayBuffer
                , Uint8Array = view.Uint8Array
                ;
            FakeBlob.fake = FB_proto.fake = true;
            while (file_ex_code--) {
                FileException.prototype[file_ex_codes[file_ex_code]] = file_ex_code + 1;
            }
            if (!real_URL.createObjectURL) {
                URL = view.URL = {};
            }
            URL.createObjectURL = function(blob) {
                var
                    type = blob.type
                    , data_URI_header
                    ;
                if (type === null) {
                    type = "application/octet-stream";
                }
                if (blob instanceof FakeBlob) {
                    data_URI_header = "data:" + type;
                    if (blob.encoding === "base64") {
                        return data_URI_header + ";base64," + blob.data;
                    } else if (blob.encoding === "URI") {
                        return data_URI_header + "," + decodeURIComponent(blob.data);
                    } if (btoa) {
                        return data_URI_header + ";base64," + btoa(blob.data);
                    } else {
                        return data_URI_header + "," + encodeURIComponent(blob.data);
                    }
                } else if (real_create_object_URL) {
                    return real_create_object_URL.call(real_URL, blob);
                }
            };
            URL.revokeObjectURL = function(object_URL) {
                if (object_URL.substring(0, 5) !== "data:" && real_revoke_object_URL) {
                    real_revoke_object_URL.call(real_URL, object_URL);
                }
            };
            FBB_proto.append = function(data/*, endings*/) {
                var bb = this.data;
                // decode data to a binary string
                if (Uint8Array && (data instanceof ArrayBuffer || data instanceof Uint8Array)) {
                    var
                        str = ""
                        , buf = new Uint8Array(data)
                        , i = 0
                        , buf_len = buf.length
                        ;
                    for (; i < buf_len; i++) {
                        str += String.fromCharCode(buf[i]);
                    }
                    bb.push(str);
                } else if (get_class(data) === "Blob" || get_class(data) === "File") {
                    if (FileReaderSync) {
                        var fr = new FileReaderSync;
                        bb.push(fr.readAsBinaryString(data));
                    } else {
                        // async FileReader won't work as BlobBuilder is sync
                        throw new FileException("NOT_READABLE_ERR");
                    }
                } else if (data instanceof FakeBlob) {
                    if (data.encoding === "base64" && atob) {
                        bb.push(atob(data.data));
                    } else if (data.encoding === "URI") {
                        bb.push(decodeURIComponent(data.data));
                    } else if (data.encoding === "raw") {
                        bb.push(data.data);
                    }
                } else {
                    if (typeof data !== "string") {
                        data += ""; // convert unsupported types to strings
                    }
                    // decode UTF-16 to binary string
                    bb.push(unescape(encodeURIComponent(data)));
                }
            };
            FBB_proto.getBlob = function(type) {
                if (!arguments.length) {
                    type = null;
                }
                return new FakeBlob(this.data.join(""), type, "raw");
            };
            FBB_proto.toString = function() {
                return "[object BlobBuilder]";
            };
            FB_proto.slice = function(start, end, type) {
                var args = arguments.length;
                if (args < 3) {
                    type = null;
                }
                return new FakeBlob(
                    this.data.slice(start, args > 1 ? end : this.data.length)
                    , type
                    , this.encoding
                );
            };
            FB_proto.toString = function() {
                return "[object Blob]";
            };
            FB_proto.close = function() {
                this.size = this.data.length = 0;
            };
            return FakeBlobBuilder;
        }(view));

    view.Blob = function Blob(blobParts, options) {
        var type = options ? (options.type || "") : "";
        var builder = new BlobBuilder();
        if (blobParts) {
            for (var i = 0, len = blobParts.length; i < len; i++) {
                builder.append(blobParts[i]);
            }
        }
        return builder.getBlob(type);
    };
}(typeof self !== "undefined" && self || typeof window !== "undefined" && window || this.content || this));

function generateArray(table) {
    var out = [];
    var rows = table.querySelectorAll('tr');
    var ranges = [];
    for (var R = 0; R < rows.length; ++R) {
        var outRow = [];
        var row = rows[R];
        var columns = row.querySelectorAll('td');
        for (var C = 0; C < columns.length; ++C) {
            var cell = columns[C];
            var colspan = cell.getAttribute('colspan');
            var rowspan = cell.getAttribute('rowspan');
            var cellValue = cell.innerText;
            if (cellValue !== "" && cellValue == +cellValue) cellValue = +cellValue;

            //Skip ranges
            ranges.forEach(function (range) {
                if (R >= range.s.r && R <= range.e.r && outRow.length >= range.s.c && outRow.length <= range.e.c) {
                    for (var i = 0; i <= range.e.c - range.s.c; ++i) outRow.push(null);
                }
            });

            //Handle Row Span
            if (rowspan || colspan) {
                rowspan = rowspan || 1;
                colspan = colspan || 1;
                ranges.push({s: {r: R, c: outRow.length}, e: {r: R + rowspan - 1, c: outRow.length + colspan - 1}});
            }
            ;

            //Handle Value
            outRow.push(cellValue !== "" ? cellValue : null);

            //Handle Colspan
            if (colspan) for (var k = 0; k < colspan - 1; ++k) outRow.push(null);
        }
        out.push(outRow);
    }
    return [out, ranges];
};

function datenum(v, date1904) {
    if (date1904) v += 1462;
    var epoch = Date.parse(v);
    return (epoch - new Date(Date.UTC(1899, 11, 30))) / (24 * 60 * 60 * 1000);
}

function sheet_from_array_of_arrays(data, opts) {
    var ws = {};
    var range = {s: {c: 10000000, r: 10000000}, e: {c: 0, r: 0}};
    for (var R = 0; R != data.length; ++R) {
        for (var C = 0; C != data[R].length; ++C) {
            if (range.s.r > R) range.s.r = R;
            if (range.s.c > C) range.s.c = C;
            if (range.e.r < R) range.e.r = R;
            if (range.e.c < C) range.e.c = C;
            var cell = {v: data[R][C]};
            if (cell.v == null) continue;
            var cell_ref = XLSX.utils.encode_cell({c: C, r: R});

            if (typeof cell.v === 'number') cell.t = 'n';
            else if (typeof cell.v === 'boolean') cell.t = 'b';
            else if (cell.v instanceof Date) {
                cell.t = 'n';
                cell.z = XLSX.SSF._table[14];
                cell.v = datenum(cell.v);
            }
            else cell.t = 's';

            ws[cell_ref] = cell;
        }
    }
    if (range.s.c < 10000000) ws['!ref'] = XLSX.utils.encode_range(range);
    return ws;
}

function Workbook() {
    if (!(this instanceof Workbook)) return new Workbook();
    this.SheetNames = [];
    this.Sheets = {};
}

function s2ab(s) {
    var buf = new ArrayBuffer(s.length);
    var view = new Uint8Array(buf);
    for (var i = 0; i != s.length; ++i) view[i] = s.charCodeAt(i) & 0xFF;
    return buf;
}

export function export_table_to_excel(id) {
    var theTable = document.getElementById(id);
    console.log('a')
    var oo = generateArray(theTable);
    var ranges = oo[1];

    /* original data */
    var data = oo[0];
    var ws_name = "SheetJS";
    console.log(data);

    var wb = new Workbook(), ws = sheet_from_array_of_arrays(data);

    /* add ranges to worksheet */
    // ws['!cols'] = ['apple', 'banan'];
    ws['!merges'] = ranges;

    /* add worksheet to workbook */
    wb.SheetNames.push(ws_name);
    wb.Sheets[ws_name] = ws;

    var wbout = XLSX.write(wb, {bookType: 'xlsx', bookSST: false, type: 'binary'});

    saveAs(new Blob([s2ab(wbout)], {type: "application/octet-stream"}), "test.xlsx")
}

function formatJson(names,jsonData) {
   return jsonData.map(v => names.map(j =>v[j]));
}

export function exportExcel(config, jsonData, sheetName, defaultTitle) {
     /* original data */
     var th = [];
     var names = [];
     config.forEach(el => {
         if (el.label) {
             th.push(el.label);
         } else {
             th.push(el.name);
         }
         names.push(el.name);
     })

     var data = formatJson(names,jsonData);
     data.unshift(th);
     var ws_name = "SheetJS";
     if (sheetName) {
         ws_name = sheetName;
     }
     var wb = new Workbook(), ws = sheet_from_array_of_arrays(data);

     /* add worksheet to workbook */
     wb.SheetNames.push(ws_name);
     wb.Sheets[ws_name] = ws;

     var wbout = XLSX.write(wb, {bookType: 'xlsx', bookSST: false, type: 'binary'});
     var title = defaultTitle || '列表'
     saveAs(new Blob([s2ab(wbout)], {type: "application/octet-stream"}), title + ".xlsx")
}

export function exportMultiSheetExcel(obj, defaultTitle) {
    var wb = new Workbook();
    var th = [];
    var names = [];
    var ws_name = "";
    obj.forEach((tmp, index) => {
        th = [];
        names = [];
        tmp.config.forEach(el => {
            if (el.label) {
                th.push(el.label);
            } else {
                th.push(el.name);
            }
            names.push(el.name);
        });
        
        var data = formatJson(names,tmp.data);
        data.unshift(th);
        ws_name = "SheetJS" + index;
        if (tmp.sheetName) {
            ws_name = tmp.sheetName;
        }
        wb.SheetNames.push(ws_name);
        wb.Sheets[ws_name] = sheet_from_array_of_arrays(data);
    });
    var wbout = XLSX.write(wb, {bookType: 'xlsx', bookSST: false, type: 'binary'});
    var title = defaultTitle || '列表';
    saveAs(new Blob([s2ab(wbout)], {type: "application/octet-stream"}), title + ".xlsx");
}

function getExcelCellConfig(config) {
  let pro = {};
  pro.alignment = {
      vertical: 'center',
      wrapText: true
  };
  if (config.type === 'NumberBox') {
      pro.alignment.horizontal = 'right';
      if (config.format && config.format.length > 1) {
          let numType = config.format[0];
          let precisionNum = config.format[1];
          let excelstyle = '0';
          if (numType === 'n' || numType === 'p') {
              excelstyle = '0';
          } else if (numType === 'c') {
              excelstyle  = '¥#,##0';
          }
          let tempStyle = '';
          if (Number(precisionNum) > 0) {
              for (let i = 0; i < Number(precisionNum); i++) {
                  tempStyle = tempStyle + '0';
              }
          }
          if (tempStyle) {
              excelstyle = excelstyle + '.'+ tempStyle;
          }
          if (numType === 'p') {
              excelstyle = excelstyle + '%';
          }
          pro.numFmt = excelstyle;
      }
      pro.t = 'n';
  } else if (config.type === 'DataBox') {
      pro.alignment.horizontal = 'center';
      let excelstyle = 'yyyy年m月d日';
      if (config.vtype === 'datetime') {
          excelstyle = 'yyyy年m月d日 h:mm:ss';
      }
      pro.numFmt = excelstyle;
      pro.t = 'd';
  } else {
      pro.alignment.horizontal = 'left';
      pro.numFmt='@';
      pro.t = 's';
  }
  return pro;
}
 

function getHeadPro(names, heads, excelData, mergelist) {
  let sIndex = 0;
  for (let i=0;i<heads.length;i++) {
      let temp = new Array(names.length).fill('');
      sIndex = 0;
     
      let preFsIndes = '';
      for (let j=0;j<heads[i].length;j++) {
          if (heads[i][j].fIndex || heads[i][j].fIndex === 0) {
              let findex = i- 1;
              let fsIndex = heads[findex][heads[i][j].fIndex].sIndex;
              if (preFsIndes !== fsIndex) {
                  sIndex = fsIndex;
                  preFsIndes = fsIndex;
              }
          }
          temp[sIndex] = heads[i][j].label;
          heads[i][j].sIndex = sIndex;
          let tempMerge = {};
          tempMerge.s = {};
          tempMerge.s.r = i;
          tempMerge.s.c = sIndex;
          tempMerge.e = {};
          tempMerge.e.r = tempMerge.s.r;
          sIndex = sIndex  + heads[i][j].num;
          if (heads[i][j].num === 1) {
              if (i === 0) {
                  tempMerge.e.r =  heads.length -1;
                  tempMerge.e.c = tempMerge.s.c;
              }
          } else {
              tempMerge.e.c = sIndex - 1;
          }
          if (i !== heads.length -1) {
              mergelist.push(tempMerge);
          }
      }
      excelData.push(temp);
  }
}
function getExportConfig (config, head, n, names, fIndex) {
  if (config instanceof Array) {
      config.forEach(el => {
          getExportConfig(el,head, n, names, fIndex);
      });
  } else {
      if (config.visible !== false) {
          let obj = {};
          obj.label = config.label;
          obj.num = 1;
          let childRenNum = 0;
          let tempIndex = head[n].length;
          if (config.children && config.children.length > 0) {
              config.children.forEach(el => {
                  let num  = getExportConfig(el, head, n+1, names, tempIndex);
                  childRenNum = childRenNum + num;
              });  
              obj.num = childRenNum;
          } else {
              if (config.name) {
                  obj.name = config.name;
                  let width = 100;
                  if (config.width) {
                      if (config.width > 100) {
                          width =  config.width;
                      }
                  } else if (config.maxWidth) {
                      if (config.maxWidth > 100) {
                          width =  config.maxWidth;
                      }
                  } else if (config.minWidth) {
                      if (config.minWidth > 100) {
                          width =  config.minWidth;
                      }
                  }
                  obj.width = width;
                  obj.excelPro = getExcelCellConfig(config);
                  names.push(obj);
              }
          }
          if (fIndex||fIndex === 0) {
              if (n !== 0) {
                  obj.fIndex = fIndex;
              } 
          }
          head[n].push(obj); 
          return obj.num;
      } else {
          return 0;
      }
  }
}

export function exportExcelStyle(config, data, headNum, filename) {
  let head = [];
  for (let i=0;i<headNum; i++) {
    head.push([]);
  }
  let num = 0;
  let names = [];       
  getExportConfig(config,head,num,names);
  let mergeslist = [];
  // 需要导出的数据
  let excelData = [];
  getHeadPro(names, head, excelData, mergeslist);
  let widthCol = [];
  names.forEach(el => {
    widthCol.push({wpx: el.width});
  });
  data.forEach(el => {
    let temp = [];
    names.forEach(el2 => {
      if (el2.excelPro.t === 'n') {
        temp.push(Number(el[el2.name]));
      } else if (el2.excelPro.t === 'd') {
        let value = datenum(new Date(el[el2.name]));
        temp.push(value);
        el2.excelPro.t = 'n';
      } else {
        temp.push(el[el2.name]);
      }
    })
    excelData.push(temp);
  });
  let namesNum = names.length;
 
   
  let defaultHeadCellStyle = {
     // 字体
     font: {
      name: '宋体',
      sz: 9,
      bold: true
    },
    border: {
      top: {
        style: 'thin'
      },
      bottom: {
        style: 'thin'
      },
      left: {
        style: 'thin'
      },
      right: {
        style: 'thin'
      }
    },
    alignment: {
      horizontal: 'center',
      vertical: 'center',
      wrapText: true
    }
  }
  let defaultCellStyle = {
    // 字体
    font: {
     name: '宋体',
     sz: 9
   },
   border: {
     top: {
       style: 'thin'
     },
     bottom: {
       style: 'thin'
     },
     left: {
       style: 'thin'
     },
     right: {
       style: 'thin'
     }
   }
 };

  // 导出的excel文件名
  let tempfilename = 'example.xlsx'
  if (filename) {
    tempfilename = filename;
   }
 
  // Excel第一个sheet的名称
  const ws_name = 'Sheet1'
  const wb = XLSX.utils.book_new();
  const ws = XLSX.utils.aoa_to_sheet(excelData)
  XLSX.utils.book_append_sheet(wb, ws, ws_name) // 将数据添加到工作薄
 
 
  // 设置标题行单元格合并
  // s即start, e即end, r即row, c即column
  // 合并从--0行0列开始,到0行3列
  if (mergeslist.length > 0) {
    ws['!merges'] = mergeslist
  }
  let x=0;
  // 可以遍历全部单元格,进行样式设置
  for (let i in ws) {
    if (i === '!merges' || i === '!ref' || i === '!cols') continue;
    ws[i].s = defaultHeadCellStyle
    if (x < namesNum*headNum) {
      ws[i].s = defaultHeadCellStyle
    } else {
      let pro =Object.assign({},{},defaultCellStyle);
      let num = x%namesNum;
      Object.assign(pro,names[num].excelPro);
      ws[i].s = pro
    }
    x++;

  }
 
  // 设置单元格宽度
  ws['!cols'] = widthCol;
 

  // 导出Excel, 注意这里用到的是XLSXS对象
  let wbout = XLSXS.write(wb, {
    bookType: 'xlsx',
    bookSST: false,
    type: 'binary'
  })
  saveAs(
    new Blob([s2ab(wbout)], {
      type: 'application/octet-stream'
    }),
    tempfilename
  )
}
 